Fix new[]/delete missmatches and memory leaks found by clang's ASAN

Sometimes memory was allocated with new[] but freed with delete instead
of delete[], which is wrong.
And there were some small memory leaks, too.
Furtunately clang's AddressSanitizer detected all that so I could easily
fix it.

(There seem to be some more small memory leaks which are harder to fix,
though)

neo/d3xp/Pvs.cpp

@@ -861,20 +861,20 @@ idPVS::Shutdown
 */
 void idPVS::Shutdown( void ) {
 	if ( connectedAreas ) {
-		delete connectedAreas;
+		delete[] connectedAreas;
 		connectedAreas = NULL;
 	}
 	if ( areaQueue ) {
-		delete areaQueue;
+		delete[] areaQueue;
 		areaQueue = NULL;
 	}
 	if ( areaPVS ) {
-		delete areaPVS;
+		delete[] areaPVS;
 		areaPVS = NULL;
 	}
 	if ( currentPVS ) {
 		for ( int i = 0; i < MAX_CURRENT_PVS; i++ ) {
-			delete currentPVS[i].pvs;
+			delete[] currentPVS[i].pvs;
 			currentPVS[i].pvs = NULL;
 		}
 	}

neo/framework/FileSystem.cpp

@@ -1344,7 +1344,7 @@ pack_t *idFileSystemLocal::LoadZipFile( const char *zipfile ) {
 			unzClose(uf);
 			delete[] buildBuffer;
 			delete pack;
-
+			Mem_Free( fs_headerLongs );
 			return NULL;
 		}
 	}

neo/game/Pvs.cpp

@@ -861,20 +861,20 @@ idPVS::Shutdown
 */
 void idPVS::Shutdown( void ) {
 	if ( connectedAreas ) {
-		delete connectedAreas;
+		delete[] connectedAreas;
 		connectedAreas = NULL;
 	}
 	if ( areaQueue ) {
-		delete areaQueue;
+		delete[] areaQueue;
 		areaQueue = NULL;
 	}
 	if ( areaPVS ) {
-		delete areaPVS;
+		delete[] areaPVS;
 		areaPVS = NULL;
 	}
 	if ( currentPVS ) {
 		for ( int i = 0; i < MAX_CURRENT_PVS; i++ ) {
-			delete currentPVS[i].pvs;
+			delete[] currentPVS[i].pvs;
 			currentPVS[i].pvs = NULL;
 		}
 	}

neo/idlib/math/Polynomial.h

@@ -53,6 +53,11 @@ public:
 					explicit idPolynomial( float a, float b, float c, float d );
 					explicit idPolynomial( float a, float b, float c, float d, float e );
 
+					~idPolynomial() // DG: don't leak coefficient's memory!
+					{
+						Mem_Free16( coefficient );
+					}
+
 	float			operator[]( int index ) const;
 	float &			operator[]( int index );
 

neo/sys/posix/posix_net.cpp

@@ -318,6 +318,7 @@ void Sys_InitNetworking(void)
 		if (num_interfaces >= MAX_INTERFACES)
 			break;
 	}
+	freeifaddrs(ifap);
 }
 
 /*

neo/ui/Winvar.cpp

@@ -42,7 +42,7 @@ idWinVar::idWinVar() {
 }
 
 idWinVar::~idWinVar() {
-	delete name;
+	delete[] name;
 	name = NULL;
 }
 

neo/ui/Winvar.h

@@ -51,7 +51,7 @@ public:
 		return "";
 	}
 	void SetName(const char *_name) {
-		delete []name;
+		delete[] name;
 		name = NULL;
 		if (_name) {
 			name = new char[strlen(_name)+1];